Iodine nutritional status of residents in coastal areas of Fujian province

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Objective To investigate the iodine nutritional status of residents in coastal areas of Fujian province,and to provide evidence for effective implementation of preventive strategy of scientific supplying of iodine.Methods In 2009,in Fujian province,6 cities were selected,then one area in every city was selected.A District Office was selected in every area,and then 1 Residents Committee in every District Office was selected.Eleven counties were selected,1 township in each county was selected,and then 1 village in each township was selected.Thirty families were selected in each Residents Committee(village),and then iodine content in household drinking water and salt were tested.The per capita salt intake in the households was calculated using 3 days weighing method.Twenty adults aged 18 to 45 were selected to test their urinary iodine; thirty pregnant and lactating women and 50 children aged 8 to 10 in each street(township ) were selected to test their urinary iodine(UI).Results One hundred and fifty three,30,94,183 and 62 families in coastal cities,inland cities,inland rural areas,coastal rural areas,and coastal mountain areas were surveyed,respectively.The median iodine content of salt was 28.4 - 30.8 mg/kg.The coverage rate of iodized salt and the qualified iodized salt consumption rate were all above 90％ in coastal cities,inland cities,inland rural areas and coastal mountain areas.The coverage rate of iodized salt and the qualified iodized salt consumption rate were 86.9％(159/183) and 83.6％(153/183) in coastal rural areas.In coastal cities,coastal rural areas,inland rural areas,inland cities and coastal mountain areas,258,300,110,160 and 101 children aged 8 - 10 were surveyed,respectively,and the median UI were 191.0,165.6,267.7,269.0 and 161.0 μg/L,respectively.One hundred and one,123,118,63 and 41 adults were surveyed,respectively,and the median UI were 197.6,203.4,174.7,302.8 and 154.9 μg/L,respectively.One hundred and fifty one,181,50,101 and 63 pregnant were surveyed,respectively,and the median UI were 156.5,141.7,116.2,163.0 and 126.2 μg/L,respectively.One hundred and fifty four,184,40,111 and 70 lactating women were surveyed,respectively,and the median UI were 130.3,118.8,110.9,154.6 and 175.9 μg/L,respectively.Conclusions The iodine nutritional level of residents in coastal areas is suitable,and iodine excess does not exists.Coastal areas still need to supply iodized salt.We should be highly concerned about the status of iodine nutrition of pregnant women and put this part of population into routine monitoring. Key words: Iodine; Urine; Sodium chloride, dietary ; Nutritional status; Data collection